Single post in Legibility Guidelines
I know I'm answering a question with a question, but... What's the use of things like the About Me description, signature or anything public viewable if they can't be read? Besides, we're not doing this for our amusement. We're actually trying to educate people with this. It's really not good practice to use a combination of colors that can ruin people's eyesight, for example. Edit: And yes, this rule is mainly in place for those who are visually impaired one way or another. Accessibility isn't just about being able to visit the site on mobile devices.